package thread;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * 1.控制线程数量
 * 2.重用线程
 */

public class TheadPoolDemo {
    public static void main(String[] args) {
        //1创建一个线程池
        ExecutorService threadPool = Executors.newFixedThreadPool(2);

        for(int i=0;i<5;i++){
            Runnable runnable = new Runnable() {
                @Override
                public void run() {
                    Thread t = Thread.currentThread();
                    System.out.println(t.getName()+":正在执行一个任务:");
                    try {
                        Thread.sleep(2000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }

                    System.out.println(t.getName()+":执行一个任务完毕!");
                }
            };
            threadPool.execute(runnable);
            System.out.println("将一个任务交给了线程池");
        }
        //threadPool.shutdown();
        threadPool.shutdownNow();
        System.out.println("线程池停止了");

    }
}
